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W. H. MoGOY & H. L. PRATT. sPIRAL SCREW DRIVER AND DRILL.

No. 529,401. Patented Nov. 20, 1894.

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1 UNITED STATES VILLAM H. MCOOY, OF MILLERS FALLS, MASSACHUSETTS, AND HENRY L. PRATT, OF BROOKLYN, NEV YORK, ASSIGNORS TO THE MILLERS FALLS COMPANY, OF MILLERS FALLS, MASSACHUSETTS.

SPIRAL SCREW-DRIVER AND DRILL.

SPECIFICATION forming part of Letters Patent No. 529,401, dated November 20, 1894.

Application tiled February 21, 1894. Serial No. 501,034. (No model.)

To all whom it may concern:

Be it known that we, VILLIAM H. MCCOY, of Millers Falls, in the county of Franklin and State of Massachusetts, and HENRY L.

PRATT,of Brooklyn,in the countyof Kings and State of New York, have invented a certain new and usefulImprovement in Spiral Screw- Drivers and Drills, of which the Jfollowing, taken in connection with the accompanying 1o drawings, is a specification.

Like letters of reference indicate corresponding parts.

This invention relates to what are known as spiral screw-drivers and drills, andthe parr5 ticular improvements which we have now made have for their object the providing of a suitable sleeve or ring, by which the tool may be better' and more efficiently operated; and also a device in connection therewith 2o which intel-locks the chuck-holding part t0 the handle when used as a screw-driver.

In the drawings Figure 1 is a general View of a spiral screw-driver and drill. Fig. 2 is a sectional view of the operative parts of the tool. Fig. 3 represents the drill chuck relnoved from the holder. Fig. 4 represents our improved loose sleeve or ring. Fig. 5 is a sectional view of the nut in which the screw part moves, and in which is shown the chuck- 3o holding part secured to the handle for use as a screw-driver.

A represents the handle; B, the screw portion; E, the chuck-holder; C, a loose sleeve or ring; D, the thilnble; a, the nut; F, the screwdriver blade or bit; G, the drill; H, the drill chuck.

The general use of this class of tools is so well known that the particular description of the method of operating the same is unnec- 4o essary. The nut for the screw is secured to the handle by the threads (a) and the screw (a2), which screw preferably passes through the ferrule (h) and holds it in place. In the lower end of the nut (a) is placed a stud (0.3).

The nut being alittle smaller than the ferrlle, forms an opening around the nut as shown in Fig. 5 at (a4). The object of this stud will be hereinafter explained.

)Ve place upon the body or chuck-holding part of the tool, the loose sleeve or ring (O). 5o Now, in operation this loose sleeve can be seized by the hand as indicated in Fig. l bythe dotted lines, while the tool is operated by the other hand, as also indicated in dotted lines in Fig. 1. Itis obvious that the chuck-head l and parts which revolve in this sleeve and the seizing of the sleeve (C) in order to force the tool against the'wo'rk, will not materially retard the revolving of the drill.\ By this means a far greater amount`of work can be 6o accomplished and the disagreeable effect of having the chuck parts or head turn in the hand is removed. We deem this one of the most important elements of our present in- Vention. 6

We preferably place upon the chuck-holder (F.) the spiralspring (d),over which the loose sleeve (O).is placed. The spring is prevented from dropping out by the internal rim (c) of the sleeve. V'e also forrn upon the opposite 7o end of the sleeve (C) the recesses (c), one or more as desired.

Vhen it is desired to use the tool as an ordinary screw-driver, the handle (A) can be pushed down and by interlocking the recess- (c) of the sleeve (C) in the stud (d3), placed in the lower end of the nut, the two parts will be securely locked together.

The object of the spring (d) is that when in ordinary use the tool is operated, the re- 8o cess (c) will not catch in the stud (a3); but when the sleeve is hooked onto the stud, the spring prevents it from falling o.

The drill chuck (H), has a round body (h). The lower end (h) is formed flat in order to prevent the chuck from turning in the chuckholder. In the body (h) are formed recesses (h3), and at the lower end are the jaws (h2).

In operation the chuck (H) is placed -in the chuck-holder (E) and the drill is placed in 9o the chuck as shown in Figs. 2 and 3. The

thirnble (D) is then screwed on,lcompressing slightly the jaws (h2) and securely holding the drill in the chuck.

)Vhen used for a screw-driver blade the 9 5 chuck (H) is removed, and the shank of the bit (F) is formed to set into the holder and is held inplace in the usual manner.

Having now described our improvements, what we claim, and desire to secure by Letters Patent of the United States, is

l. The combination of the nut a, suitablyr secured to the handle A, and provided with the stud a3; the ferrule b, also suitably secured to said handle A, and arranged to overlap the lower end of nut a, and to form the recess a4; the spiral shank connecting said handle and the chuck holding part; the loose sleeve C, secured to the lower part of the tool and provided with a suitable recess or slot, adapted to engage the stud a3, substantially as and for the purposes set forth.

2. In a spiral screw driver and drill, having a suitable handle and spiral shank, the combination of the nut a, the stud a3, the loose sleeve C, provided with the interlocking slot c, the spring d, and the chuck holding part E, arranged and adapted to hold the lower part of the tool closely to the lower end ofthe haudle, substantially as and for the purposes set forth.

3. In a spiral screw driver and drill having a suitable handle and spiral shank, a chuck holding part, a loose sleeve, secured to said chuck holding part and suitable means for securing said loose sleeve to the lower part of the handle, and adapt the whole to operate as a rigid screw driver, all combined substantially as and for the purposes set forth.

In testimony whereof we have signed our names to this specification, in the presence oli' two subscribing witnesses, on this 14th day of February, A. D. 1894.

WILLIAM I-I. MCCOY. HENRY L. PRATT.

Vitnesses to McCoy:

GEO, W. NIMs, E. S. ELLIOT.

Vitnesses to Pratt:

FREDK. S. ROBLEY, HOWARD E. SToUGHToN. 

